From £87,272
Grays, RM20
L A CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in RM20. We offer a competitive rate to complete all your extensi...
From £87,392
The England Team is an established extension buildering business in RM20. We come highly recommended and provide competitive quotes for your work.<...
From £87,096
FLEX CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in RM20. We offer a competitive rate to complete all your extens...
From £86,936
Experienced extension builder ready to quote for your work. Renewvate is the best extension builder in RM20. No obligation free quotes and many hap...
From £87,264
Our building services company Vitec Interiors Ltd have over twenty-eight years’ experience in the trade. Since then we have been helping customer...
From £87,328
Trusted and professional extension builder in RM20. Experienced in all extension buildering work and keeping within budget and on quote. PALMERS BU...
From £86,864
Trusted and professional extension builder in RM20. Experienced in all extension buildering work and keeping within budget and on quote. Access Bui...
From £86,864
HYDER CONSTRUCTION LTD is a trusted extension builder serving customers in RM20 and the surrounding area. Contact us to today to get a competitive ...
From £87,200
LRB general LTD is a trusted extension builder serving customers in RM20 and the surrounding area. Contact us to today to get a competitive quote f...
From £87,192
We are LRB General LTD and we would like to get to know you a bit better. Right, so we go first.We’ve been in the construction and renovation ind...

Building a granny annexe ranges from £86,864 (Access Builders Direct LTD based in RM17) to £87,392 (The England Team based in RM16), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in RM20 by posting a job with HaMuch. We will send it to extension builders in RM20 who will be happy to help you.
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,641

Two storey extension - £88,211

Build a timber frame extension - £26,141

Build a swimming pool - £81,141

Single storey extension - £57,816

Side return extension - £43,084

Install an RSJ - £2,341

Outbuilding - £10,141

Build a Mansard loft conversion - £52,141

Loft conversion - £35,070

Build a kitchen extension - £42,141

Hip to gable loft conversion - £42,141

Granny annexe - £87,141

Garden office - £10,141

Convert a Garage - £16,141

Garage - £18,641

Build a flat roof extension - £22,141

Build a dormer loft conversion - £42,141

Concrete foundations - £6,391

Convert a bungalow loft - £29,141

Convert a basement - £39,084